﻿/************************************************************************

   Extended Silverlight Toolkit

   Copyright (C) 2010-2012 Xceed Software Inc.

   This program is provided to you under the terms of the Microsoft Public
   License (Ms-PL) as published at http://extendedsilverlight.codeplex.com/license

   Please purchase a commercial version of this toolkit if you are using
   it in a commercial product. The commercial versions support the project,
   and also include more features for each control, priority support,
   source code, updates, removed watermark, and a proprietary license.

   Visit http://xceed.com and follow @datagrid on Twitter.

  **********************************************************************/

using System;
using System.Collections.Generic;
using Xceed.Silverlight.Data.Collections;

namespace Xceed.Silverlight.Data
{
  internal class JumpMoveAndFetchResult<T> : JumpMoveAndFetchResult
  {
    #region Constructors

    internal JumpMoveAndFetchResult(
      JumpMoveAndFetchAsyncResult asyncResult,
      Nullable<long> actualMoveCount,
      ICollection<T> fetchedItems,
      bool result,
      SourcePosition endPosition,
      RelativeOffset endPositionOffset,
      EstimateInt64 totalCount )
      : base(
          asyncResult,
          actualMoveCount,
          JumpMoveAndFetchResult<T>.Convert( fetchedItems ),
          result,
          endPosition,
          endPositionOffset,
          totalCount )
    {
    }

    internal JumpMoveAndFetchResult(
      SourcePosition sourcePosition,
      bool approximateMove,
      long expectedMoveCount,
      int expectedFetchCount,
      Nullable<long> actualMoveCount,
      ICollection<T> fetchedItems,
      bool result,
      SourcePosition endPosition,
      RelativeOffset endPositionOffset,
      EstimateInt64 totalCount )
      : base(
          sourcePosition,
          approximateMove,
          expectedMoveCount,
          expectedFetchCount,
          actualMoveCount,
          JumpMoveAndFetchResult<T>.Convert( fetchedItems ),
          result,
          endPosition,
          endPositionOffset,
          totalCount )
    {
    }

    #endregion

    #region FetchedItems Property

    internal ICollection<T> FetchedItems
    {
      get
      {
        return ( ICollection<T> )this.FetchedObjects;
      }
    }

    #endregion FetchedItems Property

    private static ImmutableCollection<T> Convert( IEnumerable<T> items )
    {
      if( items == null )
        return null;

      return items.AsImmutable();
    }
  }
}
